My rationale equivalates the undermentioned:
However, in this circumstance, an example, of software which implements this, is Codidact’s QPixel:

roke_julian_lockhart proposes a feature to allow tagging user profiles using their permanent account identifier instead of usernames. This request builds on previous discussions regarding accessing user information via permanent IDs and utilizing them for hyperlink attribution. To illustrate the desired functionality, the post references Codidact’s QPixel software, which demonstrates how mentions can be linked directly through these persistent identifiers.